Y Dictionary is a free Chrome add-on developed by hm.tony.wang. It falls under the category of Browsers and the subcategory of Add-ons & Tools. As the name suggests, Y Dictionary allows users to easily look up words and phrases while browsing web pages.

There are three ways to use Y Dictionary. Firstly, users can simply highlight a word or phrase in an article, and an icon will appear. By clicking on the icon, the user can instantly look up the selected word or phrase. Secondly, users can right-click on a highlighted word or phrase and expand the function list. By clicking on "Y Dictionary," they can quickly access the dictionary feature. Lastly, Y Dictionary can be accessed through the Chrome browser's extension toolbar. By clicking on the Y Dictionary icon, a query panel will appear, allowing users to manually enter the word they want to look up. The extension can also be pinned to the toolbar for even easier access.

With its user-friendly interface and convenient features, Y Dictionary is a valuable tool for anyone who frequently needs to look up words and phrases while browsing the web. It provides a quick and efficient way to enhance reading comprehension and expand vocabulary.